This evening he was particularly careful not to neglect his duty, for he had just come from a conference with the boy's father and mother in which it had been impressed upon him that he must exercise the greatest care to prevent Jack visiting the music hall where Ajax was being shown. So, when he opened the boy's door at about half after nine, he was greatly excited, though not entirely surprised to find the future Lord Greystoke fully dressed for the street and about to crawl from his open bed room window.

Mr. Moore made a rapid spring across the apartment; but the waste of energy was unnecessary, for when the boy heard him within the chamber and realized that he had been discovered he turned back as though to relinquish his planned adventure.

"Where were you going?" panted the excited Mr. Moore.

"I am going to see Ajax," replied the boy, quietly.

"I am astonished," cried Mr. Moore; but a moment later he was infinitely more astonished, for the boy, approaching close to him, suddenly seized him about the waist, lifted him from his feet and threw him face downward upon the bed, shoving his face deep into a soft pillow.

"Be quiet," admonished the victor, "or I'll choke you."

Mr. Moore struggled; but his efforts were in vain. Whatever else Tarzan of the Apes may or may not have handed down to his son he had at least bequeathed him almost as marvelous a physique as he himself had possessed at the same age. The tutor was as putty in the boy's hands. Kneeling upon him, Jack tore strips from a sheet and bound the man's hands behind his back. Then he rolled him over and stuffed a gag of the same material between his teeth, securing it with a strip wound about the back of his victim's head. All the while he talked in a low, conversational tone.

"I am Waja, chief of the Waji," he explained, "and you are Mohammed Dubn, the Arab sheik, who would murder my people and steal my ivory," and he dexterously trussed Mr. Moore's hobbled ankles up behind to meet his hobbled wrists. "Ah—ha! Villain! I have you in me power at last. I go; but I shall return!" And the son of Tarzan skipped across the room, slipped through the open window, and slid to liberty by way of the down spout from an eaves trough.

Mr. Moore wriggled and struggled about the bed. He was sure that he should suffocate unless aid came quickly. In his frenzy of terror he managed to roll off the bed. The pain and shock of the fall jolted him back to something like sane consideration of his plight. Where before he had been unable to think intelligently because of the hysterical fear that had claimed him he now lay quietly searching for some means of escape from his dilemma. It finally occurred to him that the room in which Lord and Lady Greystoke had been sitting when he left them was directly beneath that in which he lay upon the floor. He knew that some time had elapsed since he had come up stairs and that they might be gone by this time, for it seemed to him that he had struggled about the bed, in his efforts to free himself, for an eternity. But the best that he could do was to attempt to attract attention from below, and so, after many failures, he managed to work himself into a position in which he could tap the toe of his boot against the floor. This he proceeded to do at short intervals, until, after what seemed a very long time, he was rewarded by hearing footsteps ascending the stairs, and presently a knock upon the door. Mr. Moore tapped vigorously with his toe—he could not reply in any other way. The knock was repeated after a moment's silence. Again Mr. Moore tapped. Would they never open the door! Laboriously he rolled in the direction of succor. If he could get his back against the door he could then tap upon its base, when surely he must be heard.